7=z-(-9)

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Solution for 7=z-(-9) equation: 



7=z-(-9)

We move all terms to the left:

7-(z-(-9))=0



We calculate terms in parentheses: -(z-(-9)), so:

z-(-9)

We add all the numbers together, and all the variables

z+9

Back to the equation:

-(z+9)



We get rid of parentheses

-z-9+7=0

We add all the numbers together, and all the variables

-1z-2=0

We move all terms containing z to the left, all other terms to the right

-z=2

z=2/-1

z=-2

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